<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon slot="left" name="arrow-left" @click="$router.back()" />
      <!-- <van-icon slot="left" name="cross" @click="$router.back()" /> -->
    </van-nav-bar>
    <van-form ref="loginForm" @submit="onSubmit">
      <van-field
        v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <!-- time:倒计时 -->
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 10"
            format="ss s"
            @finish="isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            round
            size="small"
            type="default"
            @click="onSendSms"
            native-type="button"
            >发送验证码
            <!-- 在表单中，除了提交按钮外，可能还有一些其他的功能性按钮，native-type="button"
            <!如发送验证码按钮。在使用这些按钮时，要注意将native-type设置为button，否则会触发表单提交。 -->
          </van-button>
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit"
          >登录</van-button
        >
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '../../api/user'

export default {
  name: 'LoginIdex',
  components: {},
  props: {},
  data () {
    return {
      user: {
        mobile: '',
        code: ''
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            // pattern通过正则表达式校验 \d任意一位数  {9} 9位
            pattern: /^1[3|5|7|8]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '请填写验证码'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      isCountDownShow: false // 是否展示倒计时
    }
  },
  computed: {},
  watch: {},
  created () {},
  mounted () {},
  methods: {
    async onSubmit () {
      this.$toast.loading({
        message: '加载中...',
        forbidClick: true,
        //    禁用背景点击
        duration: 0
        // 持续时间，默认是2000，如果为0，则持续展示
      })

      // 3.提交表单请求登录
      try {
        const { data } = await login(this.user)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功')

        // 登录成功以后，跳转到原来页面
        // back 的方式不严谨，后面我们会进行优化
        this.$router.back()
      } catch (err) {
        if (err.responese && err.responese.status === 400) {
          console.log(err)
          this.$toast.fail('手机号或验证错误')
        } else {
          console.log(err)
          this.$toast.fail('登录失败')
        }
      }
    },
    async onSendSms () {
      console.log('onSendSms')
      // 1.校验手机号
      try {
        await this.$refs.loginForm.validate('mobile')
        console.log('验证通过')
      } catch (err) {
        return console.log('验证失败', err)
      }
      console.log(123)
      this.isCountDownShow = true
      // 2.验证通过
      // 3.请求验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败，关闭倒计时
        this.isCountDownShow = false
        if (err.responese.status === 429) {
          this.$toast('发送太频繁，请稍后重试')
        } else {
          this.$toast('发送失败，请稍后重试')
        }
      }
    }
  }
}
</script>

<style scope lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-sms-btn {
    width: 160px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
